Ubuntu Keyboard based on Maliit-Keyboard
.
Maliit provides a flexible and cross-platform input method framework. It has a
plugin-based client-server architecture where applications act as clients and
communicate with the Maliit server via input context plugins. The communication
link currently uses D-Bus. Maliit is an open source framework (LGPL 2) with
open source plugins (BSD).
.
Ubuntu-Keyboard on-screen keyboard is a Maliit plugin.

Ubuntu Keyboard based on Maliit-Keyboard
.
Maliit provides a flexible and cross-platform input method framework. It has a
plugin-based client-server architecture where applications act as clients and
communicate with the Maliit server via input context plugins. The communication
link currently uses D-Bus. Maliit is an open source framework (LGPL 2) with
open source plugins (BSD).
.
Ubuntu-Keyboard on-screen keyboard is a Maliit plugin.